Correct. They are not visible.
I could convert these anchors into visible URLs and they should work. Nevertheless I will not be doing that.
When I mentioned JS I was thinking of the presence of the onclick attribute and the vote() function as seen below.
<a id='up_15739117' onclick='return vote(event, this, "up")' href='vote?id=15739117&how=up&auth=&goto=reply%3Fgoto%3Dedit%3Fid%3D15738201%2315739117%26id%3D15739117#15739117'>